1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Simora [160]
1 year ago
8

Really need help guys! Love you if you can solve them wiz steps!!!!

Mathematics
1 answer:
Marta_Voda [28]1 year ago
5 0

Answer:

Step-by-step explanation:

x^2+y^2-8x+4y+4=0\\\\a)\\\\x^2-8x+y^2+4y+4=0\\\\x^2-2*x*4+(y^2+2*y*2+2^2)=0\\\\x^2-2*x*4+4^2+(y+2)^2=4^2\\\\(x-4)^2+(y+2)^2=4^2\\

Hence,

The radius of the circle is 4 units, coordinates of its centre are (4,-2).

b)\\\\y=0\\x^2+0^2-8x+4*0+4=0\\x^2-8x+4=0\\a=1\ \ \ \ b=-8\ \ \ \ c=4\\D=(-8)^2-4*1*4\\D=64-14\\D=48\\\sqrt{D}=\sqrt{48} \\ \sqrt{D}=\sqrt{16*3} \\\sqrt{D}=\sqrt{4^2*3}  \\\sqrt{D}=4\sqrt{3}  \\\displaystyle\\x=\frac{-(-8)б4\sqrt{3} }{2*1} \\\\x=\frac{8б4\sqrt{3} }{2} \\x_1=4-2\sqrt{3} \\x_2=4+2\sqrt{3}

c)\\\\A(6,2\sqrt{3}-2)\\ (x-4)^2+(y+2)^2=4^2\\(6-4)^2+(2\sqrt{3} -2+2)^2=16\\2^2+(2\sqrt{3} )^2=16\\4+2^2*(\sqrt{3})^2=16\\ 4+4*3=16\\4+12=16\\16\equiv16

d)\\A(6,2\sqrt{3}-2)}\\\sqrt{3} x+3y=\\\sqrt{3}(6)+3(2\sqrt{3} -2)=\\ 6\sqrt{3}+6\sqrt{3} -6=\\ 12\sqrt{3}-6

You might be interested in
HURRY ANSWER!!!!!!!!1 3^3+5⋅5
Step2247 [10]
Hello,

The correct answer is 52!
Hope this helps!
Brainliest?
3 0
2 years ago
Read 2 more answers
Solve for the specified variable c=1/6rt for r
natali 33 [55]

t = \frac{1}{6ct}

multiply both sides by 6rt

6crt = 1 ( divide both sides by 6ct to obtain r )

t = \frac{1}{6ct}


6 0
2 years ago
Help ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
natali 33 [55]

Answer:

A Swedish court said Friday that rapper ASAP Rocky will be detained for another week as prosecutors decide whether to formally charge him following a fight last month in downtown Stockholm.

The rapper, born Rakim Mayers, has been in Swedish custody, along with two of his associates, since early July after a June 30 altercation that Rocky’s supporters say he tried to avoid. Under the court’s decision Friday, the men could be detained until at least July 25.

Concerns have mounted for the men amid reports that they are being held in “inhumane conditions,” including long daily periods of solitary confinement. A growing number of lawmakers and celebrities, including Kim Kardashian and Kanye West, has called for their release.

8 0
2 years ago
PLEASE HURRRY!!!!!!!!!!!!!
kifflom [539]

22+2y

<h2>hope it helps you ❣❣ </h2>

Mark me as brainliest

4 0
3 years ago
Read 2 more answers
if a snail can travels 200 inches in 2 hours, in 2 hours how long will it take the snail to travel 50 inches
Veronika [31]
I'm pretty sure you just answered your own question, (no hate), but I'm going to take a guess and say 2 hours??
7 0
3 years ago
Read 2 more answers
Other questions:
  • 5 x - 2y equals 10 ; (3,-5)
    5·1 answer
  • on a certain day the temperature in Seattle was -1 degrees C and the temperature in the Hudson was 18 degrees C is how many degr
    9·1 answer
  • Susan throws a softball upward into the air at a speed of 32 feet per second from a 24 dash foot platform. the distance upward t
    10·1 answer
  • Brandon follows a 2,800 calorie per diet. He has 11 servings of breads and cereals which average 140 calories each. Yesterday he
    10·1 answer
  • If you had 28 / 10 dollars how much money would that be in dollars and cents rounded to the nearest penny?
    7·2 answers
  • For what side length(s) is the area of an equilateral triangle equal to 30 cm?? Only enter the number, in centimeters, rounded t
    13·1 answer
  • A card is drawn at random from a standard deck of cards. P(club or diamond)
    7·1 answer
  • On 1st September 2014 there were 5400 trees planted in a wood.
    13·1 answer
  • A warehouse is used as a grannary. It is in
    9·1 answer
  • The value of stock changes from $22 on Monday to $30 on Tuesday. Calculate the percent increase.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!